I own a server and our spawn is up in the air..but when anybody who is not oped tries to press a button it just sits there not pressing!

What I expected to happen was...:
For a non-op to press the button successfully

*What actually happened was...:
Te button just sat there and won't press down.

Steps to Reproduce:
1. try build a bock with a button up high
2. ...make sure you are not op or it will press
3. ...Try to press it